CloudFormation

note

CloudFormation support is available now in early access for the Infracost GitHub and GitLab apps, contact hello@infracost.io if you'd like to request access. CLI and IDE support for CloudFormation are on the roadmap for 2026 and we’ll share more as those pieces come together. AutoFix pull requests do not currently work with CloudFormation.

Overview

Infracost supports both YAML and JSON formats for CloudFormation (CFN). The following outlines support for the various CFN features:

Feature	Support
Resources	✅
Parameters	✅
Mappings	✅
Conditions	✅
Transforms	✅
Outputs	✅
DependsOn	✅
Rules	✅
Modules	❌
Intrinsic Functions	✅
Nested stack support	✅
Language extensions	✅
Pseudo parameters	✅
Dynamic references	❌
Hooks	❌
Stack/org tags	❌

Transform support

Name	Type	Support
AWS::Serverless-2016-10-31	Native	✅
AWS::Include	Native	✅
AWS::LanguageExtensions	Native	✅
AWS::CodeDeployBlueGreen	Native	✅
Count	Community	✅
Explode	Community	✅
Boto3	Community	✅
ExecutionRoleBuilder	Community	✅
PyPlate	Community	❌
StringFunctions	Community	✅
S3Objects	Community	✅
ShortHand	Community	✅
StackMetrics	Community	❌

Intrinsic support

Name	Type	Support
Base64	Native	✅
Equals	Native	✅
And	Native	✅
Or	Native	✅
Not	Native	✅
Condition	Native	✅
FindInMap	Native	✅
FindInMap (extended)	LanguageExtensions	✅
GetAtt	Native	✅
GetAZs	Native	✅
If	Native	✅
ImportValue	Native	❌
Join	Native	✅
Ref	Native	✅
Select	Native	✅
Split	Native	✅
Sub	Native	✅
Transform	Native	✅
ForEach	LanguageExtensions	✅
Length	LanguageExtensions	✅
ToJsonString	LanguageExtensions	✅

Rain support

Name	Type	Support
Rain:Embed	Directive	❌
Rain:Include	Directive	❌
Rain:Env	Directive	❌
Rain:S3Http	Directive	❌
Rain:S3	Directive	❌
Fn::Select	Intrinsic	❌
Fn::InsertFile	Intrinsic	❌
Fn::Invoke	Intrinsic	❌
Modules	Entrypoint	❌
Packaging	Entrypoint	❌